Assiminea castanea Westerlund, 1883 accepted as Angustassiminea castanea (Westerlund, 1883) (original description)
Calyculina japonica Westerlund, 1883 accepted as Sphaerium (Musculium) japonicum (Westerlund, 1883) represented as Sphaerium japonicum (Westerlund, 1883) (original description)
Cyrena crebricostis Westerlund, 1883 accepted as Corbicula fluminea (O. F. Müller, 1774) (original description)
Helix eumenes Westerlund, 1883 accepted as Trishoplita eumenes (Westerlund, 1883) (original description)
Helix ruderata var. opulens Westerlund, 1883 (original description)
Limnaea onychia Westerlund, 1883 accepted as Radix onychia (Westerlund, 1883) (original description)
Melania japonica var. ornata Westerlund, 1883 (original description)
Melania lentiginosa var. nymphula Westerlund, 1883 accepted as Melanoides tuberculata (O. F. Müller, 1774) (original description)
Melania niponica var. decipiens Westerlund, 1883 accepted as Semisulcospira decipiens (Westerlund, 1883) (original description)
Neritina nordquisti Westerlund, 1883 accepted as Clithon olivaceum (Récluz, 1843) (original description)
Pisidium arcticum Westerlund, 1883 accepted as Euglesa casertana (Poli, 1791) (original description)
Pisidium glaciale Westerlund, 1883 accepted as Euglesa casertana (Poli, 1791) (original description)
Pisidium nivale Westerlund, 1883 accepted as Euglesa casertana (Poli, 1791) (original description)
Planorbis (Gyraulus) associatus Westerlund, 1883 accepted as Gyraulus associatus (Westerlund, 1883) (original description)
Planorbis (Gyraulus) demissus Westerlund, 1883 accepted as Gyraulus demissus (Westerlund, 1883) (original description)
Planorbis (Gyraulus) hiemantium Westerlund, 1883 accepted as Gyraulus hiemantium (Westerlund, 1883) (original description)
Planorbis (Gyraulus) illibatus Westerlund, 1883 accepted as Gyraulus illibatus (Westerlund, 1883) (original description)
Planorbis (Hippeutis) versicolor Westerlund, 1883 accepted as Helicorbis cantori (W. H. Benson, 1850) (original description)
Planorbis (Segmentina) spirodelus Westerlund, 1883 accepted as Polypylis calathus (W. H. Benson, 1850) (original description)
Planorbis mica Westerlund, 1883 accepted as Polypylis nitidella (E. von Martens, 1877) (original description)
Stenogyra didyma Westerlund, 1883 accepted as Opeas didyma (Westerlund, 1883) (original description)
Succinea annexa Westerlund, 1883 accepted as Novisuccinea strigata (L. Pfeiffer, 1855) (original description)
Succinea chrysis Westerlund, 1883 accepted as Novisuccinea strigata (L. Pfeiffer, 1855) (original description)

Alaska for Pisidium arcticum Westerlund, 1883 
Alaska for Pisidium glaciale Westerlund, 1883 
Alaska for Pisidium nivale Westerlund, 1883 
Alaska for Succinea annexa Westerlund, 1883 
Alaska for Succinea chrysis Westerlund, 1883 
Bering Island for Helix ruderata var. opulens Westerlund, 1883 
Ceylon for Melania lentiginosa var. nymphula Westerlund, 1883 
Ceylon for Neritina nordquisti Westerlund, 1883 
Ceylon for Planorbis (Gyraulus) associatus Westerlund, 1883 
Ceylon for Planorbis (Gyraulus) demissus Westerlund, 1883 
Ceylon for Planorbis (Hippeutis) versicolor Westerlund, 1883 
Ceylon for Planorbis (Segmentina) spirodelus Westerlund, 1883 
Hong Kong for Cyrena crebricostis Westerlund, 1883 
Honshu for Limnaea onychia Westerlund, 1883 
Honshu for Melania niponica var. decipiens Westerlund, 1883 
Honshu Island for Helix eumenes Westerlund, 1883 
Japan for Assiminea castanea Westerlund, 1883 
Japan for Calyculina japonica Westerlund, 1883 
Japan for Melania japonica var. ornata Westerlund, 1883 
Japan for Planorbis (Gyraulus) hiemantium Westerlund, 1883 
Japan for Planorbis (Gyraulus) illibatus Westerlund, 1883 
Japan for Planorbis mica Westerlund, 1883 
Malay Peninsula for Stenogyra didyma Westerlund, 1883